Photographic-plate holder



(NoModel.) s'sheets-sheet 2^.

E. L. BERGSTRBSSBR.

PHOTOGRAPHIG PLATE HOLDER.

No. 281,660- PatentedJu 24, .1188s.

(NoMoael.) s sheets-sheet 3. E. L. BBRGSTRESSER.

PHOTOGRAPH-IG PLATE HOLDER.

N0, 281,660l Patented July 24, 1883.

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UNITED STATES.

PATENT GFFICE.

EDVIN L. BERGSTRESSEIQ OF HUBLERSBURG, PENNSYLVANIA.

PHoToGRAPl-HC-PLATE HOLDER.

SPECIFICATION forming part of Letters Patent No. 281,660, dated July 24, 1883.

Application filed April 21, 1883.

To @ZZ whom, it may! concern.'

Beit known that I, EDWIN Lofi` BERGs'rRns- SER, a citizen of the United States, residing at Hublersburg, in the county of Centre and State of Pennsylvania, have invented a new and useful Photographic-Plate Holder, of which the following is a specification, reference bcing had to the accompanying drawings.

This invention relates to photographic-dryplate holders and it consists in certain iniprovements in the construction of the same, which will be hereinafter fully described, and particularly pointed out in the claims.

In the drawings hereto annexed, Figure 1 is a perspective view of the improved plate holder or receptacle. Fig. 2 is a longitudinal vertical sectional view of the same. Fig. 3 is a vertical transverse sectional view taken on line w 5v in Fig. 2. Fig. l is a vertical transverse sectional view on the line y y in Fig. 2.

, Fig. 5 is a perspective view of the transfer tudinal sectional view of the same.

tablet or holder. Fig. 6 is a vertical longi- Fig. 7 is a vertical sectional view of the same. Fig. 8 is a vertical sectional view, showing the transfer-tablet in position for removing a plate from the holder. Fig. 9 is a vertical sectional view on the line z z in Fig. 8; and Fig. 10 is a perspective view, illustrating a modification in the construction of the plate-holder.

The same letters refer to the same parts in all the figures.

A in the drawings designates a box or receptacle of suitable size and shape to hold 'any desired numberof plates, each of which is temporarily held in a frame, B, of the usual construction. The box or receptacle A is made with a hinged cover, C, and I prefer to make it with an inner false` casing, D, in order to maintain an equal temperature in the venting the interior of the casing from being greatly affected by changes of temperature.

The cover C of box A is provided at each end with an opening, E, extending entirely across and surrounded by a flange, F, within which is placeda plate, G, of sheet metal or other suitable material, having an opening, I-I, corresponding to the opening in the cover, and surrounded by a'ilange, I. In the cover C, under the openings E, are formed bearingsrfor slides J, by means of which the said openings may be closed tightly in such a manner as to (No model.)

exclude light from the box. The outer ends of the slides, which form the handles of the same, are provided with upwardly-proj ecting pins K, the'object of which will be hereinaf` ter more fully described. One end of the box A is provided with an opening, L, in which slides a rod, M, carrying at its inner end a follower, N, fitting in the box. The outerend of the rod M has a knob or handle, O, by which Ypointer one number forward on the scale for every plate that is removed for the purpose of being exposed in the camera.

S represents the manipulating tablet or holder, which consists of a box of suitable size to hold a single plate or frame. The said box has a sliding side', T, for the purpose of exposing the plate, and a sliding bottom, U.

The solid side of the box is provided with aA knob or handle, V, and its top is provided with an ope11ing,\V,to admit a vertically-sliding rod, X, screw-threaded at its lower end, and provided at its upper end with a handle, Y.

The frames B B,in which the dry-plates are temporarilyheld, are provided with screwthreaded perforations Z in their upper edges, adapted to receive the lower screw-threaded ends of the rods X. I would f here state that instead of threading the rods and openings the rods may be provided any suitable means by which they may be readily connected with and as readily detached from the frames B as occasion shall require, as will be presently more fully explained.

The slide U, which forms the bottom ofthe box or tablet S, extends in front of the same, and is provided with an opening, A2, adapted to register with and receive the pins K, which project upwardly from the slides .I of the plateholder A.

In operation any desired number of the dryplates may be kept in the box or holder A, the frames B being set on edge in the same, as clearly shown in the drawings. To remove a IOO plate `from the box, the mouth of the manipulating-tablet is adjusted between the flanges F and I, surrounding the opening at the end of box A farthest from the follower. In this manner a perfeetlylight tight joint is formed, and the pin K ofthe slide J will extend through the opening A2 in the slide U. The slides being thus connected, may be simultaneously withdrawn, and the rod X may then be lowered and connected with the frame B, which is underneath. By again raising the rod the said frame may now be lifted up into the manipulating tablet or box S without being exposed to light. The slides are then again closed and the box S removed. It will be again observed that inasmuch as the slides are connected they will be closed simultaneously, and the operator will be in no danger of forgetting` to close the slide J, in which event light would be admitted into the box and its contents destroyed. The operator now removes the manipulating-tablet to the camera, in which the plate may be exposed in the usual manner by removing the slide T. This having been done and the slide T again closed, the box S is returned to the plate-holding box A, and its mouth adjusted in the same manner as before, between the flanges F and I, but this time at the end of the box nearest the follower. The latter is now, by means of its operating-rod, pushed inwardly into the box for the purpose of pushing all the frames B toward the opposite end and making room for the frame and plate which a-re to be transferred from the manipulating-tablet. The slides are now withdrawn simultaneously, as before, and the frame and plate lowered into the holder. The rod X is then detached and lifted up into the box S, the slides are closed, and the box S may then'be removed for a repetition of the operation.

In the box or holder A the plates may be safely kept for any length of time until it shall be convenient to develop and iix the negatives. By its use and that of the manipulating-tablet S the dark room,77 which has always been a source of annoyance, is dispensed with, and the plates may be manipulatedmore safely and conveniently than heretofore.

In Fig. l() of the drawings I have illustrated a modification in the construction of my improved plate-holder. In this case the box A is provided with a series of vertical partitions, B2 B2, dividing it into any desired number of compartments, C2, each ot' sufficient size to accommodate a single frame, B. Fach of these compartments is provided with a top slide, J, having an upwardly-projecting pin, K, in the same manner and for the same purpose which has been before described. The upper side of the box is provided with longitudinal flanges D2 along the front and rear edges, to receive a slide, F2, which is large enough to cover two of the openings F2 in the top ofthe box. The

slide F2 has an opening, G2, capable of registering with one of the openings F2, and sur- The operation of rounded by a flange, H2.

this device will readily be understood from the foregoing description. By moving .the slide it may be adjusted over any one of the openings in the box to which it may be dcsired to have access, and the said slide at the same time covers the opening to which access was last had, thereby preventing mistakes.

I. claim as my invention, and desire to secure by Letters Patent ofthe United Statesl. In a photographic-dry-plate holder, the combination of a suitable box or receptacle, a hinged cover for the same, provided with openings at each end, slides arranged under the said openings, a suitable follower adapted to force the centents of the box toward one end of the same, and a registering device, substantially as and for the purpose set forth.

2. In a photographic-dry-plate holder, the herein-described box or receptacle, having an inner adjustable casing whereby an airspace is fornied, whereby changes of temperature are prevented from affecting the interior of the box, as set forth.

A photographicdry-plate holder comprising a box or receptacle provided at or near its ends with openings for the insertion and removal of the plates and means for moving the plates from one end of the box. to the other, whereby a plate removed at one end of the box may be afterward reinserted at the other end, substantially as and for the purpose set forth.

4. In a photographie-dryplate holder, the combination ofthe box or receptacle provided with openings for the admission and removal of plates, slide-covers for the said openings, provided with upwardly projecting pins at vtheir front ends, and a manipulating-tablet consisting of a box having a sliding bottom provided with an opening adapted to register withl and receive the pins projecting upwardly from the slides of the holder, whereby the said slides may be connected so as to be simultaneneously opened or closed, as set forth.

5. As an improvement in photographic-dryplate holders, the combination of a box or receptacle having a hinged cover provided with an opening at each end for the admission and removal of plates, slides for the said openings, provided with upwardly-projecting pins at their front ends, double flanges surroumling the openings, a manipulating-tablet having a slide-bottom provided with an opening at its front end, a rod sliding vertically in said manipulating-tablet and provided with a screwthread at its lower end, and the plate-holding frames provided with screw-threaded openings in their upper edges to receive the said screwthreaded rod, the whole constructed and arranged to operate substantially as and for the purpose herein shown and specified.

In testimony that I claim the :foregoing as my own I have hereto aiiixed my signature in presence of two witnesses.

lvtnesses: EDWIN LO'l BERGS'IRESSER.

C. M. Bowne, DANIEL XVoonnINc.

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